International Journal of Modern Physics a最新文献

Gauge Bosons Masses in the context of the Supersymmetric SU(3)C⊗SU(3)L⊗U(1)N model 超对称SU(3)C⊗SU(3)L⊗U(1)N模型背景下的尺度玻色子质量

IF 1.6 4区物理与天体物理

International Journal of Modern Physics a Pub Date : 2024-05-27 DOI: 10.1142/s0217751x24400013

M. C. Rodriguez

{"title":"Gauge Bosons Masses in the context of the Supersymmetric SU(3)C⊗SU(3)L⊗U(1)N model","authors":"M. C. Rodriguez","doi":"10.1142/s0217751x24400013","DOIUrl":"https://doi.org/10.1142/s0217751x24400013","url":null,"abstract":"In this article, we present a detailed study of the masses of all gauge bosons, as well as explaining recent experimental data regarding the W-boson mass presented by the CDF collaboration and even possible changes that these data can bring to experimental measurements of the masses of Z-boson mass in the context of the Minimal Supersymmetric <math altimg=\"eq-00003.gif\" display=\"inline\"><mstyle><mtext mathvariant=\"normal\">SU</mtext></mstyle><msub><mrow><mo stretchy=\"false\">(</mo><mn>3</mn><mo stretchy=\"false\">)</mo></mrow><mrow><mi>C</mi></mrow></msub><mo>⊗</mo><mstyle><mtext mathvariant=\"normal\">SU</mtext></mstyle><msub><mrow><mo stretchy=\"false\">(</mo><mn>3</mn><mo stretchy=\"false\">)</mo></mrow><mrow><mi>L</mi></mrow></msub><mo>⊗</mo><mstyle><mtext mathvariant=\"normal\">U</mtext></mstyle><msub><mrow><mo stretchy=\"false\">(</mo><mn>1</mn><mo stretchy=\"false\">)</mo></mrow><mrow><mi>N</mi></mrow></msub></math> Model. We also intend to show a phenomenological analysis of possible mixtures of gauge bosons in this model. We will show that our numerical predictions for the masses of the physical gauge bosons are within the current experimental limits.","PeriodicalId":50309,"journal":{"name":"International Journal of Modern Physics a","volume":"35 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141195653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Decay of the Higgs boson to longitudinally polarized leptons and quarks 希格斯玻色子向纵向极化轻子和夸克的衰变

IF 1.6 4区物理与天体物理

International Journal of Modern Physics a Pub Date : 2024-05-27 DOI: 10.1142/s0217751x24500398

R. T. Ovsiannikov, A. Yu. Korchin

{"title":"Decay of the Higgs boson to longitudinally polarized leptons and quarks","authors":"R. T. Ovsiannikov, A. Yu. Korchin","doi":"10.1142/s0217751x24500398","DOIUrl":"https://doi.org/10.1142/s0217751x24500398","url":null,"abstract":"An important problem in particle physics is the interaction of Higgs boson with the fermions. In the processes which involve <math altimg=\"eq-00001.gif\" display=\"inline\"><mi>h</mi><mi>f</mi><mi>f</mi></math> interaction, the manifestations of <math altimg=\"eq-00002.gif\" display=\"inline\"><mi>C</mi><mi>P</mi></math>-violation are possible. This in turn can be helpful in solving the problem of the dominance of matter over antimatter in the universe. In this regard, here, the effect of longitudinal polarization of leptons and quarks produced in the decay of the Higgs boson is investigated and calculated. We consider the case in which the Higgs boson interacts with fermions via a mixture of scalar and pseudoscalar couplings. Under this assumption, the longitudinal polarization can acquire nonzero values due to the imaginary part of loop corrections to tree-level amplitudes. This polarization is a direct signature of the <math altimg=\"eq-00003.gif\" display=\"inline\"><mi>C</mi><mi>P</mi></math>-violation in the Higgs sector. Effects of the longitudinal polarization of <math altimg=\"eq-00004.gif\" display=\"inline\"><mi>τ</mi></math> leptons on the energy distribution of the pions in the two-step Higgs-boson decay <math altimg=\"eq-00005.gif\" display=\"inline\"><mi>h</mi><mo>→</mo><msup><mrow><mi>τ</mi></mrow><mrow><mo>−</mo></mrow></msup><msup><mrow><mi>τ</mi></mrow><mrow><mo>+</mo></mrow></msup><mo>→</mo><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup><msub><mrow><mi>ν</mi></mrow><mrow><mi>τ</mi></mrow></msub><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup><msub><mrow><mover accent=\"true\"><mrow><mi>ν</mi></mrow><mo>̄</mo></mover></mrow><mrow><mi>τ</mi></mrow></msub></math> are also studied, and the energy asymmetries with corresponding moments are calculated.","PeriodicalId":50309,"journal":{"name":"International Journal of Modern Physics a","volume":"24 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141196032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Energies and a gravitational charge for massive particles in general relativity 广义相对论中大质量粒子的能量和引力电荷

IF 1.6 4区物理与天体物理

International Journal of Modern Physics a Pub Date : 2024-05-22 DOI: 10.1142/s0217751x24500490

Sinya Aoki, Tetsuya Onogi, Tatsuya Yamaoka

{"title":"Energies and a gravitational charge for massive particles in general relativity","authors":"Sinya Aoki, Tetsuya Onogi, Tatsuya Yamaoka","doi":"10.1142/s0217751x24500490","DOIUrl":"https://doi.org/10.1142/s0217751x24500490","url":null,"abstract":"In this paper, we investigate relations or differences among various conserved quantities which involve the matter Energy Momentum Tensor (EMT) in general relativity. These quantities include the energy with Einstein’s pseudo EMT, the generalized Komar integral, or the ADM energy, all of which can be derived from Noether’s second theorem, as well as an extra conserved charge recently proposed in general relativity. For detailed analyses, we apply definitions of these charges to a system of free massive particles. We employ the post-Newtonian (PN) expansion to make physical interpretations. We find that the generalized Komar integral is not conserved at the first non-trivial order in the PN expansion due to non-zero contributions at spatial boundaries, while the energy with Einstein’s pseudo EMT at this order agrees with a total energy of massive particles with gravitational interactions through the Newtonian potential, and thus is conserved. In addition, this total energy is shown to be identical to the ADM energy not only at this order but also all orders in the PN expansion. We next calculate an extra conserved charge for the system of massive particles, at all orders in the PN expansion, which turns out to be a total number of particles. We call it a gravitational charge, since it is clearly different from the total energy. We finally discuss an implication from a fact that there exist two conserved quantities, energy and gravitational charge, in general relativity.","PeriodicalId":50309,"journal":{"name":"International Journal of Modern Physics a","volume":"18 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141148280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

General perturbations in D+1 standard and brane cosmology revisited 再论 D+1 标准宇宙学和布雷恩宇宙学中的一般扰动

IF 1.6 4区物理与天体物理

International Journal of Modern Physics a Pub Date : 2024-05-21 DOI: 10.1142/s0217751x24500404

Zoé Delfín, Rubén Cordero, Tonatiuh Matos, Miguel A. García-Aspeitia

{"title":"General perturbations in D+1 standard and brane cosmology revisited","authors":"Zoé Delfín, Rubén Cordero, Tonatiuh Matos, Miguel A. García-Aspeitia","doi":"10.1142/s0217751x24500404","DOIUrl":"https://doi.org/10.1142/s0217751x24500404","url":null,"abstract":"In this work, we generalize the theory of perturbations in a (<math altimg=\"eq-00001.gif\" display=\"inline\" overflow=\"scroll\"><mi>D</mi><mo>+</mo><mn>1</mn></math>)-dimensional space–time with cosmological constant, studying scalar, vector and tensor perturbations, as well as its structure in Newtonian and Synchronous gauge. We also show the theory of perturbations in the context of brane cosmology, where branes are embedded in a set of D-spatial dimensions, a temporal dimension, and an additional spatial dimension. In both standard and brane cosmology, an unperturbed space–time is provided with a Friedmann–Lemaitre–Robertson–Walker metric and arbitrary sectional curvature, the matter content has the shape of a perfect fluid. In addition, we consider the arbitrary sectional curvature, obtaining the respective equations in the Newtonian and Synchronous gauge. We highlight that the results presented in this paper can be used to treat brane cosmology with two concentric branes or tackle the <math altimg=\"eq-00002.gif\" display=\"inline\" overflow=\"scroll\"><msub><mrow><mi>σ</mi></mrow><mrow><mn>8</mn></mrow></msub></math> tension with a braneworld approach. Finally, as an example of the utility of all the technology presented in this paper, we show an application to the energy flux and the repercussions in the framework of the braneworlds.","PeriodicalId":50309,"journal":{"name":"International Journal of Modern Physics a","volume":"34 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141148282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Decays of radially excited vector mesons ρ′ and ω′ in the extended NJL model 扩展 NJL 模型中径向激发矢量介子 ρ′ 和 ω′ 的衰变

IF 1.6 4区物理与天体物理

International Journal of Modern Physics a Pub Date : 2024-05-21 DOI: 10.1142/s0217751x24500428

M. K. Volkov, A. B. Arbuzov, A. A. Pivovarov, K. Nurlan

引用次数: 0

Color symmetry and confinement as an underlying superconformal structure in holographic QCD 全息 QCD 中作为基本超形式结构的色彩对称和约束

IF 1.6 4区物理与天体物理

International Journal of Modern Physics a Pub Date : 2024-05-09 DOI: 10.1142/s0217751x24410070

Guy F. de Téramond, Stanley J. Brodsky

{"title":"Color symmetry and confinement as an underlying superconformal structure in holographic QCD","authors":"Guy F. de Téramond, Stanley J. Brodsky","doi":"10.1142/s0217751x24410070","DOIUrl":"https://doi.org/10.1142/s0217751x24410070","url":null,"abstract":"Dedicated to the memory of our colleague, Harald Fritzsch, who, together with Murray Gell-Mann, introduced the color quantum number as the exact symmetry responsible for the strong interaction, thus establishing quantum chromodynamics (QCD) as a fundamental non-Abelian gauge theory. A basic understanding of hadron properties, however, such as confinement and the emergence of a mass scale, from first principles QCD has remained elusive: Hadronic characteristics are not explicit properties of the QCD Lagrangian and perturbative QCD, so successful in the large transverse momentum domain, is not applicable at large distances. In this article, we shall examine how this daunting obstacle is overcome in holographic QCD with the introduction of a superconformal symmetry in anti de Sitter (AdS) space which is responsible for confinement and the introduction of a mass scale within the superconformal group. When mapped to light-front coordinates in physical spacetime, this approach incorporates supersymmetric relations between the Regge trajectories of meson, baryon and tetraquark states which can be visualized in terms of specific <math altimg=\"eq-00001.gif\" display=\"inline\" overflow=\"scroll\"><mi>S</mi><mi>U</mi><msub><mrow><mo stretchy=\"false\">(</mo><mn>3</mn><mo stretchy=\"false\">)</mo></mrow><mrow><mi>C</mi></mrow></msub></math> color representations of quarks. We will also briefly discuss here the implications of holographic models for QCD color transparency in view of the present experimental interest.","PeriodicalId":50309,"journal":{"name":"International Journal of Modern Physics a","volume":"25 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140939619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The dynamics of vacuum, gravity and matter: Implications on the fundamental constants 真空、引力和物质的动力学：对基本常数的影响

IF 1.6 4区物理与天体物理

International Journal of Modern Physics a Pub Date : 2024-04-30 DOI: 10.1142/s0217751x24410161

Joan Solà Peracaula

{"title":"The dynamics of vacuum, gravity and matter: Implications on the fundamental constants","authors":"Joan Solà Peracaula","doi":"10.1142/s0217751x24410161","DOIUrl":"https://doi.org/10.1142/s0217751x24410161","url":null,"abstract":"The possibility that the vacuum energy density (VED) <math altimg=\"eq-00001.gif\" display=\"inline\" overflow=\"scroll\"><msub><mrow><mi>ρ</mi></mrow><mrow><mstyle><mtext mathvariant=\"normal\">vac</mtext></mstyle></mrow></msub></math> could be time dependent in the expanding Universe is intuitively more reasonable than just a rigid cosmological constant for the entire cosmic history. The dynamics of <math altimg=\"eq-00002.gif\" display=\"inline\" overflow=\"scroll\"><msub><mrow><mi>ρ</mi></mrow><mrow><mstyle><mtext mathvariant=\"normal\">vac</mtext></mstyle></mrow></msub><mo>=</mo><msub><mrow><mi>ρ</mi></mrow><mrow><mstyle><mtext mathvariant=\"normal\">vac</mtext></mstyle></mrow></msub><mo stretchy=\"false\">(</mo><mi>H</mi><mo stretchy=\"false\">)</mo></math> as a function of the Hubble rate, <math altimg=\"eq-00003.gif\" display=\"inline\" overflow=\"scroll\"><mi>H</mi><mo stretchy=\"false\">(</mo><mi>t</mi><mo stretchy=\"false\">)</mo></math>, most likely contributes to alleviate cosmological problems and tensions, having also implications on the so-called fundamental ‘constants’ of Nature, which should be slowly drifting with the cosmic expansion owing to the fluctuations of the quantum vacuum. This includes the gravitational ‘constant’ G, but also the gauge and Yukawa couplings as well as the particle masses themselves (both of dark matter and baryonic matter). The subtle exchange of energy involved is the basis for the “micro and macro connection”. Herein, I discuss not only this connection as a possibility but also show that it is in fact a generic prediction of QFT in cosmological spacetime which is fully compatible with general covariance. This fact has not been pointed out until recently when an appropriate renormalization framework for the VED has been found which is free from the usual conundrums associated with the cosmological constant problem.","PeriodicalId":50309,"journal":{"name":"International Journal of Modern Physics a","volume":"11 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140836898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modular flavor symmetric models 模块化味道对称模型

IF 1.6 4区物理与天体物理

International Journal of Modern Physics a Pub Date : 2024-04-30 DOI: 10.1142/s0217751x24410124

Tatsuo Kobayashi, Morimitsu Tanimoto

引用次数: 0

Look how it runs! 看看它是如何运行的！

IF 1.6 4区物理与天体物理

International Journal of Modern Physics a Pub Date : 2024-04-30 DOI: 10.1142/s0217751x24410057

Siegfried Bethke

引用次数: 0

The flavor puzzle: Textures and symmetries 风味之谜：纹理和对称性

IF 1.6 4区物理与天体物理

International Journal of Modern Physics a Pub Date : 2024-04-24 DOI: 10.1142/s0217751x24410033

Hans Peter Nilles, Saúl Ramos-Sánchez

引用次数: 0